NPCs composing that spawngroup :

Burynai_excavator (33%)

Burynai_excavator (34%)

greater_scalebone (33%)

NPCs spawning around that spawngroup :
(Max range : 100)

kurn_1, range=66 (87,-231,122)

greater_skeleton (100%)
greater_skeleton (100%)

kurn_5, range=82 (103,-223,-102)

greater_scalebone (100%)

kurn_7, range=72 (45,-357,-22)

kurn_8, range=71 (108,-244,4)

kurn_10, range=76 (87,-218,-102)

kurn_17, range=27 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_35, range=31 (80,-278,-99)

kurn_41, range=13 (48,-299,-97)

Burynai_sapper (100%)

kurn_82, range=91 (-41,-276,-23)

kurn_87, range=77 (71,-211,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_156, range=89 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_161, range=81 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_163, range=89 (-10,-218,132)

kurn_165, range=67 (34,-219,132)

kurn_166, range=36 (32,-253,132)

kurn_169, range=52 (0,-270,132)

kurn_176, range=37 (63,-250,124)